Python入門到實踐 day two

一系列按照特定順序排列的元素組成。

bicycles=

["trek"
,"cannondable"
,"redline"
,"specialized"
]print
(bicycles)

bicycles=

["trek"
,"cannondable"
,"redline"
,"specialized"
]print
(bicycles[0]
)#訪問列表第乙個元素
print
(bicycles[0]
.title())
>trek
>trek

print

(bicycles[-1
])#訪問列表最後乙個元素
print
(bicycles[-2
])#訪問列表倒數第二個元素

message=

"my first bicycle was a "
+bicycles[0]
.title()+
"."print
(message)

motorcycles=

["honda"
,"yamaha"
,"suzuki"
]print
(motorcycles)
motorcycles[0]
='ducati'
print
(motorcycles)

motorcycles=

["honda"
,"yamaha"
,"suzuki"
]print
(motorcycles)
"ducati"
)print
(motorcycles)

motorcycles=

"honda"
)"yamaha"
)"suzuki"
)

motorcycles=

["honda"
,"yamaha"
,"suzuki"
]motorcycles.insert(0,
"ducati"
)#方法insert()，指定插入元素值與索引位置

motorcycles=

["honda"
,"yamaha"
,"suzuki"
]print
(motorcycles)
del motorcycles[0]
#del 刪除指定索引位置的值
print
(motorcycles)
popped_motorcycle=motorcycles.pop(
)#方法pop()，預設刪除列表末尾的值，但任然可以訪問
print
(motorcycles)
print
(popped_motorcycle)

motorcycles=

["honda"
,"yamaha"
,"suzuki"
]first_owned=motorcycles.pop(0)
#pop()方法可指定刪除特定索引位置值
print
("the first owned was a "
+first_owned.title()+
"!")

motorcycles=

["honda"
,"yamaha"
,"suzuki"
,"ducati"
]too_expensive=
"ducati"
motorcycles.remove(too_expensive)
#remove()方法根據元素值刪除列表中元素
print
(motorcycles)
print
("\na "
+too_expensive.title()+
" is too expensive for me!"
)

cars=

["bmw"
,"audi"
,"toyota"
,"subaru"
]cars.sort(
)#方法sort()永久性對列表進行排序
print
(cars)

cars=

["bmw"
,"audi"
,"toyota"
,"subaru"
]cars.sort(reverse=
true
)#方法sort()永久性對列表進行排序,reverse=true,按照字母順序相反方向排列
print
(cars)

cars=

["bmw"
,"audi"
,"toyota"
,"subaru"
]print
("here is the ordinary list:"
)print
(cars)
print
("\nhere is the sorted list:"
)print
(sorted
(cars)
)#函式sorted()對列表進行臨時排序
print
("\nhere is the ordinary list again:"
)print
(cars)

cars=

["bmw"
,"audi"
,"toyota"
,"subaru"
]cars.reverse(
)#方法reverse()永久性反轉列表元素
print
(cars)

cars=

["bmw"
,"audi"
,"toyota"
,"subaru"
]len
(cars)
#函式len()獲取列表長度，即列表元素數量

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